Afghanistan sub-catchment scale drought index dataset: Standardised Precipitation Evapotranspiration Index (SPEI), 1980-2017

The dataset shows the results of SPEI at monthly (SPEI-1), seasonal (SPEI-3) and annual (SPEI-12) temporal scales for mapping the spatiotemporal change dynamics of drought characteristics (distribution, frequency, severity and duration) in Afghanistan. SPEI indices were mapped for river basins, disaggregated into 189 sub-catchments, using monthly precipitation and potential evapotranspiration derived from temperature station observations from 1980 to 2017 (water year - Oct to Sep). \nLineage: The dataset was produced using a python script. Input data are monthly precipitation and monthly evapotranspiration (based on Pearson III distribution and). \n\n

本数据集提供了月尺度（SPEI-1）、季尺度（SPEI-3）及年尺度（SPEI-12）下的标准化降水蒸散指数（SPEI，Standardized Precipitation Evapotranspiration Index）结果，用于刻画阿富汗地区干旱特征（分布、发生频率、干旱强度及持续时长）的时空变化动态。本数据集以1980年至2017年（水文年为10月至次年9月）的气温站点观测数据推导得到的月降水量与潜在蒸散量为基础，对阿富汗境内的流域进行SPEI空间分布制图，该流域被划分为189个子汇水区。数据谱系：本数据集通过Python脚本生成，输入数据为月降水量与月蒸散量（基于Pearson III分布）。